[maemo-developers] [maemo-developers] Xephyr troubles

[From: guardian at planet-d.net]

Hello,

I wanted to start using Encode (http://encode.sourceforge.net) for my maemo developments so I installed Xephyr on my Ubuntu host using apt-get install (xserver-xephyr 6.6.1-0ubuntu1).

I have a problem illustrated by the code of the following expose callback:

scrWidget->background and scrWidget->pixmap are 2 pixmaps.
scrWidget->pixmap contains scribbles rendered on mouse down and mouse move events.
 
when i comment out the drawing of one of the 2 pixmaps, the other get displayed correctly.
 
when i combine them using GDK_AND it works when launching Xephyr from  its location inside scratchbox (as provided by the Maemo 1.1 i386 tarball)
 
when i combine them using GDK_AND it does not work when launching Xephyr from my Ubuntu host (Xephyr has been installed using apt-get install)
what i get displayed is the content of the scrWidget->pixmap (black scribbles on a white background) which does not blend with the background pixmap at all.
 
in both cases the Xephyr command line used is:
Xephyr :2 -host-cursor -screen 800x480x16 -dpi 96 -ac

i don\'t know if the detail is usefull or not but when launching Xephyr from the scratchbox path (/scratchbox/users/guardian/targets/SDK_PC/usr/bin/Xephyr), it opens up with a white background

when launching Xephyr from the ubuntu host path (/usr/bin/Xephyr), it opens up with a traditional \"checkboard\" background, which makes me thinkg that somehow the configuration is not exactly the same.

so ... am I doing something wrong in my code ? or is there something to configure on my Xephyr ubuntu installation ???

gboolean callbackExpose(GtkWidget* widget, GdkEventExpose* event, ScribbleWidget* scrWidget)
{
  GdkGC* gc = gdk_gc_new(widget->window);
 
  gdk_draw_drawable(widget->window,
                    widget->style->fg_gc[GTK_WIDGET_STATE(widget)],
                    scrWidget->background,
                    event->area.x,
                    event->area.y,
                    event->area.x,
                    event->area.y,
                    event->area.width,
                    event->area.height);
 
  gdk_gc_copy(gc,widget->style->fg_gc[GTK_WIDGET_STATE(widget)]);
  gdk_gc_set_function(gc,GDK_AND);
 
  gdk_draw_drawable(widget->window,
                    gc,
                    scrWidget->pixmap,
                    event->area.x,
                    event->area.y,
                    event->area.x,
                    event->area.y,
                    event->area.width,
                    event->area.height);
 
  g_object_unref(gc);
 
  return FALSE;
}

Thx for any help.
Regards,
G.